-----Original Message----- From: python-list-bounces+ramit.prasad=jpmorgan....@python.org [mailto:python-list-bounces+ramit.prasad=jpmorgan....@python.org] On Behalf Of Chris Angelico Sent: Thursday, September 29, 2011 11:51 AM To: python-list@python.org Subject: Re: Question on Manipulating List and on Python
On Fri, Sep 30, 2011 at 2:36 AM, Subhabrata Banerjee <subhagurgaon2...@gmail.com> wrote: > And Python seems faster than C++/Java. It is indeed. I also experience > it. > Python compared to Java? Difficult to compare. Python to C++? Impossible to compare. But performance depends MASSIVELY on algorithmic quality; if you code the exact same thing in Python and in C++, you would probably find that the C++ one is faster, but chances are you're implementing approximately the same thing in two quite different ways. Or possibly you're using a slow and inefficient library or third-party function. I've sometimes written code in one language and directly ported it to another, and then run both on the same hardware. With most such experiments, CPython generally doesn't perform all that well, and C or C++ rocks. But frequently, the C/C++ code is more verbose and more error-prone than the Python - because Python's biggest boast is not that it's fast, but that it's *fast enough*, while being easy to work with. (And every once in a while there's something where I want to use a pointer to some other variable, and that's a concept that just plain doesn't work in Python. You have references to objects, but you can't from one place change another variable, without using some kind of mutable object that they both reference.) ----------------------------------------------------------------------- I think Steven D'Aprano had an excellent post on this a week or so ago (on the tutor list, not this one). See: http://mail.python.org/pipermail/tutor/2011-September/085573.html Ramit Ramit Prasad | JPMorgan Chase Investment Bank | Currencies Technology 712 Main Street | Houston, TX 77002 work phone: 713 - 216 - 5423 ChrisA -- http://mail.python.org/mailman/listinfo/python-list This email is confidential and subject to important disclaimers and conditions including on offers for the purchase or sale of securities, accuracy and completeness of information, viruses, confidentiality, legal privilege, and legal entity disclaimers, available at http://www.jpmorgan.com/pages/disclosures/email. -- http://mail.python.org/mailman/listinfo/python-list
